iOS利用系统打电话和发短信

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iOS利用系统打电话和发短信

1.在app中直接调用两行代码就可以实现打电话的功能了，代码如下：

<pre name="code" class="objc">//  打电话
NSString *string = @"tel:1008611";// 要打的电话号码
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:string]];

2.发短信有两种方式，

（1）一种是跳出app调到发短信的系统页，（即，发完短信不回自动返回app，需重新打开app），方法简单，但不实用。和打电话一样实现方法，代码如下：

<pre name="code" class="objc">//  app 外发短信
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:@"sms:1008611"]];

（2）在app中利用系统框架 MessageUI.framework 和

MFMessageComposeViewControllerDelegate 代理实现（有点复杂，但最实用）

步骤一：在Build Phases 的 Link Binary With Libraries 中导入系统框架 MessageUI.framework，在需要发短信的ViewController.m(视图控制器)中导入头文件

#import <MessageUI/MessageUI.h>

导入代理 （MFMessageComposeViewControllerDelegate）

@interface ViewController ()<MFMessageComposeViewControllerDelegate>

步骤二：实现的代码如下

#pragma mark 发信息的触发方法
- (void)sendMessage
{if ([MFMessageComposeViewController canSendText])//  判断设备能不能发信息{UIAlertController *alertC = [UIAlertController alertControllerWithTitle:@"温馨提示：" message:@"发信息给对方" preferredStyle:UIAlertControllerStyleAlert];UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:@"好的" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {//  message  全局变量MFMessageComposeViewController *message = [[MFMessageComposeViewController alloc]init];message.messageComposeDelegate = self;message.body = @"我在测试，车友助理";message.recipients = [NSArray arrayWithObjects:@"1008611", @"1008611", nil];[self presentViewController:message animated:NO completion:nil];}];[alertC addAction:cancel];[alertC addAction:defaultAction];[self presentViewController:alertC animated:NO completion:nil];}else{UIAlertController *alertC = [UIAlertController alertControllerWithTitle:@"温馨提示：" message:@"当前设备不支持发信息功能" preferredStyle:UIAlertControllerStyleAlert];UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:@"默认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {}];[alertC addAction:cancel];[alertC addAction:defaultAction];[self presentViewController:alertC animated:NO completion:nil];}
}

#pragma mark 发信息的代理方法
- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result
{switch (result){case MessageComposeResultCancelled:{[controller dismissViewControllerAnimated:NO completion:nil];UIAlertController *alertC = [UIAlertController alertControllerWithTitle:@"温馨提示：" message:@"取消发信息" preferredStyle:UIAlertControllerStyleAlert];UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];[alertC addAction:cancel];[self presentViewController:alertC animated:NO completion:nil];}break;case MessageComposeResultSent:{[controller dismissViewControllerAnimated:NO completion:nil];UIAlertController *alertC = [UIAlertController alertControllerWithTitle:@"温馨提示：" message:@"发信息成功!" preferredStyle:UIAlertControllerStyleAlert];UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];[alertC addAction:cancel];[self presentViewController:alertC animated:NO completion:nil];}break;case MessageComposeResultFailed:{[controller dismissViewControllerAnimated:NO completion:nil];UIAlertController *alertC = [UIAlertController alertControllerWithTitle:@"温馨提示：" message:@"发信息失败!" preferredStyle:UIAlertControllerStyleAlert];UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];[alertC addAction:cancel];}break;default:break;}
}

由于时间关系，没有对 UIAlertController 进行封装，看起来代码有些多，请见谅。转载请保障原著特权